These case studies come from the Ellen MacArthur Foundation's report, Building Prosperity. The report highlights six circular economycircular economyA systems solution framework that tackles global challenges like climate change, biodiversity loss, waste, and pollution. It is based on three principles, driven by design: eliminate waste and pollution, circulate products and materials (at their highest value), and regenerate nature. strategies that have the potential to unlock a nature-positive future for Europe with economic, environmental and social benefits. These case studies have been selected as demonstrators of those strategies.